Search results for "ogas"

Synthesis of novel antimitotic agents based on 2-amino-3-aroyl-5-(hetero)arylethynyl thiophene derivatives

2011

Microtubules are dynamic structures that play a crucial role in cellular division and are recognized as an important target for cancer therapy. In search of new compounds with strong antiproliferative activity and simple molecular structure, a new series of 2-amino-3-(3',4',5'-trimethoxybenzoyl)-5-(hetero)aryl ethynyl thiophene derivatives was prepared by the Sonogashira coupling reaction of the corresponding 5-bromothiophenes with several (hetero)aryl acetylenes. When these compounds were analyzed in vitro for their inhibition of cell proliferation, the 2- and 3-thiophenyl acetylene derivatives were the most powerful compounds, both of which exerted cytostatic effects at submicromolar conc…

Lipīdu un polifenolu sastāva salīdzinājums krūmmelleņu (Vaccinium corymbosum) kultivāros un citās Vaccinium ģints ogās

2018

Lipīdu un polifenolu sastāva salīdzinājums krūmmelleņu (Vaccinium corymbosum) kultivāros un citās Vaccinium ģints ogās. Meijere E. K., zinātniskā vadītāja docente, Dr. ķīm. Ilva Nakurte, Bakalaura darbs, 53 lappuses, 20 attēli, 17 tabulas, 38 literatūras avoti, 2 pielikumi. Latviešu valodā. Literatūras apskatā apkopota informācija par krūmmelleņu (Vaccinium corymbosum L.) kultivāriem ‘Polaris’, ‘Patriot’,’ Chippewa’, ‘Blue crop’, ‘Blue ray’, ‘Blue gold’, ‘North blue’, ‘Duke’ un citām Vaccinium ģints ogām - zilene (Vaccinium uliginosum L.), brūklene (Vaccinium vitis-ideaea L.), mellene (Vaccinium myrtillus L.), purva dzērvene (Vaccinium oxycoccos L.), lielogu dzērvene (Vaccinium macrocarpon …

Small bowel gastrointestinal stromal tumor presenting with gastrointestinal bleeding in patient with type 1 Neurofibromatosis: Management and laparos…

2021

Highlights • A multidisciplinary team is mandatory for the correct management of hemorrhagic GIST and its complications. • There is a well-known association between type 1 Neurofibromatosis and GIST. • Type 1 Neurofibromatosis-GIST and sporadic GIST have different behaviour. • In case of localised and resectable GIST surgical treatment is the mainstay. • Laparoscopic approach, if performed correctly, is safe and effective with better short-term outcomes then open surgery.

Effect of conditioned media on three genotypes ofDrosophila melanogaster: Physical, chemical, and biological aspects

1986

The uric acid contents in larvae, pupae, and culture media were studied during larval and pupal development in three genotypes of Drosophila melanogaster reared in both crowded and noncrowded conditions. The uric acid content and the response of genotypes in media supplemented with 10 and 15 mg/ml of uric acid were correlated with the outcome obtained in conditioned media. In addition, the behavior of genotypes in conditioned media is explained in terms of the physicochemical properties of the conditioned media, which include uric acid content, the amount of food ingested, the degree of free water, the physical disturbance within the cultures, and the particular response of each genotype to…

Larva-to-adult and pupa-to-adult mortality dynamics in crowded cultures ofDrosophila melanogaster

1985

Pupal mortality is shown here to bear the main responsibility for total mortality duringDrosophila melanogaster development in crowded conditions. The dynamics of the pupa-to-adult and larva-to-adult processes of mortality follows a S-shaped logistic model, like survival in density-dependent processes. Data given here confirm to some extent Wallace's suggestion that pupal mortality is a density-dependent process.

Larval competition in Drosophila melanogaster: frequency-dependence of viability

1988

The application of the overfeeding technique (interruption of the competition during larval development) to the study of larval competition in two-strain cultures of Drosophila melanogaster demonstrates the following points: (1) viability is a function of competition time; (2) viability becomes more frequency-dependent as competition time increases; (3) the dynamics of the “inner” subpopulation (adults that have passed all their development in a crowded condition) and “outer” subpopulation (adults coming from larvae recovered by interruption of competition) vary with time as regards frequency-dependence; and (4) the wild type strain Oregon is the active agent in competition with the strain …

Intra- and intergenotypic larval competition in Drosophila melanogaster : effect of larval density and biotic residues

1987

Characterizing the Invasive Tumor Front of Aggressive Uterine Adenocarcinoma and Leiomyosarcoma

2021

The invasive tumor front (the tumor–host interface) is vitally important in malignant cell progression and metastasis. Tumor cell interactions with resident and infiltrating host cells and with the surrounding extracellular matrix and secreted factors ultimately determine the fate of the tumor. Herein we focus on the invasive tumor front, making an in-depth characterization of reticular fiber scaffolding, infiltrating immune cells, gene expression, and epigenetic profiles of classified aggressive primary uterine adenocarcinomas (24 patients) and leiomyosarcomas (11 patients). Sections of formalin-fixed samples before and after microdissection were scanned and studied. Reticular fiber archit…

Photoactivation of Drosophila melanogaster cryptochrome through sequential conformational transitions

2019

Time-resolved x-ray scattering reveals light-induced signal transduction in insect cryptochromes.

In vitro induction of cecropin genes — an immune response in a Drosophila blood cell line

1992

The Drosophila melanogaster cell line mbn-2 was explored as a model system to study insect immune responses in vitro. This cell line is of blood cell origin, derived from larval hemocytes of the mutant lethal (2) malignant blood neoplasm (1(2)mbn). The mbn-2 cells respond to microbial substances by the activation of cecropin genes, coding for bactericidal peptides. The response is stronger than that previously described for SL2 cells, and four other tested Drosophila cell lines were totally unresponsive. Bacterial lipopolysaccharide, algal laminarin (a beta-1,3-glucan), and bacterial flagellin were strong inducers, bacterial peptidoglycan fragments gave a weaker response, whereas a formyl-m…